Jyoung,
Building a rifle is not rocket science, but it is not something you can just decide to do, go grab the parts off the shelf and assemble it.
Like building an engine, yep you can do it. But will it run as good as the original, not likely. Alot of little tricks and steps to do it right.
It is important that you learn how in steps and perfect each step prior to the next. By doing this you will learn what works and what doesn't.
As others have posted, learn to bed first. Once you have done that and can see the improvement in the guns performance, go on to working on the triggers, etc.
If you pick up the phone and call Brownells or Midway, they will sell you all the components you want right down to hand reamers to chamber with. When you are done you will have a custom rifle that has about as much chance of shooting well as I have spending the night with Halle Berry. And will prob cost you alot more than if you just go buy a good rifle.
One good way to learn is check with your local community collage, alot of them have beginning gun smith classes and most of these are taugh by having the students build a rifle under the instructors supervision.
I learned out of frustration after waiting for months for two different rifles only to get something I did not want! I took it in baby steps and prob did 10 beddng jobs before moving on. I still have the first bedding job as a major example of WHAT NOT TO DO, lol
DO NOT and I repeat, DO NOT go buy a bunch of components and try to do it yourself without serious help.
JMHO
Randy